[RHSA-2015:2233-03] Moderate: tigervnc security, bug fix, and enhancement update

[news 28]

-----BEGIN PGP SIGNED MESSAGE-----

Hash: SHA1

 

=====================================================================

Red Hat Security Advisory

 

Synopsis: Moderate: tigervnc security, bug fix, and enhancement update

Advisory ID: RHSA-2015:2233-03

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-2233.html

Issue date: 2015-11-19

CVE Names: CVE-2014-8240 CVE-2014-8241

=====================================================================

 

1. Summary:

 

Updated tigervnc packages that fix two security issues, several bugs, and

add various enhancements are now available for Red Hat Enterprise Linux 7.

 

Red Hat Product Security has rated this update as having Moderate security

impact. Common Vulnerability Scoring System (CVSS) base scores, which give

detailed severity ratings, are available for each vulnerability from the

CVE links in the References section.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Server (v. 7) - aarch64, noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, noarch, ppc64, ppc64le, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - noarch, x86_64

 

3. Description:

 

Virtual Network Computing (VNC) is a remote display system which allows

users to view a computing desktop environment not only on the machine where

it is running, but from anywhere on the Internet and from a wide variety of

machine architectures. TigerVNC is a suite of VNC servers and clients.

The tigervnc packages contain a client which allows users to connect to

other desktops running a VNC server.

 

An integer overflow flaw, leading to a heap-based buffer overflow, was

found in the way TigerVNC handled screen sizes. A malicious VNC server

could use this flaw to cause a client to crash or, potentially, execute

arbitrary code on the client. (CVE-2014-8240)

 

A NULL pointer dereference flaw was found in TigerVNC's XRegion.

A malicious VNC server could use this flaw to cause a client to crash.

(CVE-2014-8241)

 

The tigervnc packages have been upgraded to upstream version 1.3.1, which

provides a number of bug fixes and enhancements over the previous version.

(BZ#1199453)

 

This update also fixes the following bug:

 

* The position of the mouse cursor in the VNC session was not correctly

communicated to the VNC viewer, resulting in cursor misplacement.

The method of displaying the remote cursor has been changed, and cursor

movements on the VNC server are now accurately reflected on the VNC client.

(BZ#1100661)

 

All tigervnc users are advised to upgrade to these updated packages, which

correct these issues and add these enhancements.

 

4. Solution:

 

Before applying this update, make sure all previously released errata

relevant to your system have been applied.

 

For details on how to apply this update, refer to:

 

https://access.redhat.com/articles/11258

 

5. Bugs fixed (https://bugzilla.redhat.com/):

 

1072733 - vnc black screen and error 'XRequest.130: BadValue (integer parameter out of range for operation) 0x400'

1119640 - VNC-EXTENSION missed on Xorg server regeneration

1151307 - CVE-2014-8240 tigervnc: integer overflow flaw, leading to a heap-based buffer overflow in screen size handling

1151312 - CVE-2014-8241 tigervnc: NULL pointer dereference flaw in XRegion

1162722 - tigervnc-server has no IPV6 support

1181287 - gnome 3 session inside vncserver changes initial resolution instead of using what was specified from "-geometry

1194898 - Rebuild tigervnc against rebased xserver in 7.2

1195266 - The display number is not required in the file name for VNC

1199437 - Enable Xinerama extension

1199453 - Re-base to tigervnc-1.3.x

 

6. Package List:

 

Red Hat Enterprise Linux Client (v. 7):

 

Source:

tigervnc-1.3.1-3.el7.src.rpm

 

noarch:

tigervnc-icons-1.3.1-3.el7.noarch.rpm

tigervnc-license-1.3.1-3.el7.noarch.rpm

 

x86_64:

tigervnc-1.3.1-3.el7.x86_64.rpm

tigervnc-debuginfo-1.3.1-3.el7.x86_64.rpm

tigervnc-server-1.3.1-3.el7.x86_64.rpm

tigervnc-server-minimal-1.3.1-3.el7.x86_64.rpm

 

Red Hat Enterprise Linux Client Optional (v. 7):

 

noarch:

tigervnc-server-applet-1.3.1-3.el7.noarch.rpm

 

x86_64:

tigervnc-debuginfo-1.3.1-3.el7.x86_64.rpm

tigervnc-server-module-1.3.1-3.el7.x86_64.rpm

 

Red Hat Enterprise Linux ComputeNode (v. 7):

 

Source:

tigervnc-1.3.1-3.el7.src.rpm

 

noarch:

tigervnc-license-1.3.1-3.el7.noarch.rpm

 

x86_64:

tigervnc-debuginfo-1.3.1-3.el7.x86_64.rpm

tigervnc-server-minimal-1.3.1-3.el7.x86_64.rpm

 

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

 

noarch:

tigervnc-icons-1.3.1-3.el7.noarch.rpm

tigervnc-server-applet-1.3.1-3.el7.noarch.rpm

 

x86_64:

tigervnc-1.3.1-3.el7.x86_64.rpm

tigervnc-debuginfo-1.3.1-3.el7.x86_64.rpm

tigervnc-server-1.3.1-3.el7.x86_64.rpm

tigervnc-server-module-1.3.1-3.el7.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 7):

 

Source:

tigervnc-1.3.1-3.el7.src.rpm

 

aarch64:

tigervnc-1.3.1-3.el7.aarch64.rpm

tigervnc-debuginfo-1.3.1-3.el7.aarch64.rpm

tigervnc-server-1.3.1-3.el7.aarch64.rpm

tigervnc-server-minimal-1.3.1-3.el7.aarch64.rpm

 

noarch:

tigervnc-icons-1.3.1-3.el7.noarch.rpm

tigervnc-license-1.3.1-3.el7.noarch.rpm

 

ppc64:

tigervnc-1.3.1-3.el7.ppc64.rpm

tigervnc-debuginfo-1.3.1-3.el7.ppc64.rpm

tigervnc-server-1.3.1-3.el7.ppc64.rpm

tigervnc-server-minimal-1.3.1-3.el7.ppc64.rpm

 

ppc64le:

tigervnc-1.3.1-3.el7.ppc64le.rpm

tigervnc-debuginfo-1.3.1-3.el7.ppc64le.rpm

tigervnc-server-1.3.1-3.el7.ppc64le.rpm

tigervnc-server-minimal-1.3.1-3.el7.ppc64le.rpm

 

s390x:

tigervnc-1.3.1-3.el7.s390x.rpm

tigervnc-debuginfo-1.3.1-3.el7.s390x.rpm

tigervnc-server-1.3.1-3.el7.s390x.rpm

tigervnc-server-minimal-1.3.1-3.el7.s390x.rpm

 

x86_64:

tigervnc-1.3.1-3.el7.x86_64.rpm

tigervnc-debuginfo-1.3.1-3.el7.x86_64.rpm

tigervnc-server-1.3.1-3.el7.x86_64.rpm

tigervnc-server-minimal-1.3.1-3.el7.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional (v. 7):

 

aarch64:

tigervnc-debuginfo-1.3.1-3.el7.aarch64.rpm

tigervnc-server-module-1.3.1-3.el7.aarch64.rpm

 

noarch:

tigervnc-server-applet-1.3.1-3.el7.noarch.rpm

 

ppc64:

tigervnc-debuginfo-1.3.1-3.el7.ppc64.rpm

tigervnc-server-module-1.3.1-3.el7.ppc64.rpm

 

ppc64le:

tigervnc-debuginfo-1.3.1-3.el7.ppc64le.rpm

tigervnc-server-module-1.3.1-3.el7.ppc64le.rpm

 

x86_64:

tigervnc-debuginfo-1.3.1-3.el7.x86_64.rpm

tigervnc-server-module-1.3.1-3.el7.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 7):

 

Source:

tigervnc-1.3.1-3.el7.src.rpm

 

noarch:

tigervnc-icons-1.3.1-3.el7.noarch.rpm

tigervnc-license-1.3.1-3.el7.noarch.rpm

 

x86_64:

tigervnc-1.3.1-3.el7.x86_64.rpm

tigervnc-debuginfo-1.3.1-3.el7.x86_64.rpm

tigervnc-server-1.3.1-3.el7.x86_64.rpm

tigervnc-server-minimal-1.3.1-3.el7.x86_64.rpm

 

Red Hat Enterprise Linux Workstation Optional (v. 7):

 

noarch:

tigervnc-server-applet-1.3.1-3.el7.noarch.rpm

 

x86_64:

tigervnc-debuginfo-1.3.1-3.el7.x86_64.rpm

tigervnc-server-module-1.3.1-3.el7.x86_64.rpm

 

These packages are GPG signed by Red Hat for security. Our key and

details on how to verify the signature are available from

https://access.redhat.com/security/team/key/

 

7. References:

 

https://access.redhat.com/security/cve/CVE-2014-8240

https://access.redhat.com/security/cve/CVE-2014-8241

https://access.redhat.com/security/updates/classification/#moderate

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2015 Red Hat, Inc.

-----BEGIN PGP SIGNATURE-----

Version: GnuPG v1

 

iD8DBQFWTkFbXlSAg2UNWIIRApcmAJ9ZlXEToKIsDNrTFr5FRkcRISLqugCggmed

562fPnuqRjojP14BU4Imu04=

=TyNg

-----END PGP SIGNATURE-----

 

--